Typewriting-machine



E. A. PETERSON. TYPEWRITING MACHINE.

APPLICATION HLED MAR. 2,1920.

1,397,544, v Patented Nov. 22 1921.

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INVENTOHJ UNITED STATES; PATENT OFFICE.

EDWIN A. rnrnnson, or MADISON, WISCONSIN, ASSIGNOR T0 unnnnwoon TYPE- WRITER COMPANY, OF NEVT YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEWRITING-MAOHINE.

Specification of Letters Patent.

Patented Nov. 22, 1921.

Application filed March 2, 1920. Serial No. 362,644.

2" 0 (LN 10 71cm it may concern Be it known that I, EDWIN A. PnrnRsoN, a citizen of the United States, residing in Madison, in the county of Dane and State of Wisconsin, have invented certain new and useful Improvements in Typewriting- Machines, lication.

This invention relates to typewriters, and, more particularly, to means adapted to facilitate the erasure of matter erroneously typed on a work-sheet without shifting such matter from the printing line.

Heretofore, it has been the practice in typewriters having long alining devices ex tending along the printing line, in case of an error' which necessitates the erasure of one or more characters, to first rotate the platen to advance the work-sheet and thus move the part bearing thecharacters tobe erased to a position sufficiently removed from the type-bar guide and ribbon mechanism to permit the erasure to be eiiected. In many cases, after making an erasure, in the abovementioned manner, the operator has tailed either to bring the line in which the error was made back exactly to the printing line or to return the sheet at all. In either of these cases, the characters typed to correct the error would be out of alinement and such characters might be slightly displaced laterally, thus detracting from the desired uniformity and neatness of the typed page. v

The foregoing objectionable features have been satisfactorily overcome by the heroindisclosed invention which comprises an improved work-sheet alining gage or wing scale having a cutaway portion or recess in its alining edge at a point which will be readily accessible to the typist, so that whenever an error is made, the samemay be corrected by merely moving the typewriter carriage laterally, so as to bring the incorrectl typed characters inregister with the recessed portion in saidgage or scale, after which the erasure may readily be made. in order that errors maybe corrected at any point in a typed line, two such gages or scales may be employed, oneat each side of the printing point of the machine.

It may be observed that the improved gage or wig scale renders it unnecessary to rotate the platen or to otherwise change the line spacing relation of the work-sheet relatively to the printingmechanismbetore making an erasure. It therefore entirely eliminates of which the following is a speci the possibility of varying the adjustment of the work-sheet relatively to the printing mechanism and renders readjustment unnecessary, thereby resulting in economy of time and labor as well as contributing ma.- terially to the neatness and general appearance Oftlle work which may be executed by the machine.

The herein-disclosed invention has an added advantage when it is desired to cor rect an error made near the bottom ota work-sheet. Heretotore, it haisbeen impos sible to correct such an error without removing the sheet from the machine, since the necessary rotation of the platen to ad vance the same to a sufficient extent, to per niit the erroneous characters to be erased, would cause itstrailing end to be advanced beyond the teed-rolls. V7 hen making a correction on a work-sheet being typed on a machine having my invention applied thereto, the erasure maybe as readily made in the last line typed upon the sheet asat other point, since the letters to be erased may be brought to a positionadapted for suchpurpose by merely letter-spacing or back-spec ing the carriage, as above explained, without line-spacing the same.

@ther features and advantages will hereinafter appear.

In the accompanying drawings,

Figure I is a top or plan view of a part oi an Underwood standard typewriter with my invention applied thereto.

Fig; 2 isa detail of one form 0; the improved sheet-alining gage or wing scale.

Referring to the above-mentioned drawthe type-bar segment of a typewriter. At

is indicated the usual type-bar guide,

which may be secured to the type-bar segment in any appropriate manner. The usual ribbon vibrator, for bringing the ribbon 16 to the printing line at each depression of a key, is indicated at 17, said ribbon being fed from one to the other or" ribbon spools 18 in the usual manner.

At 24 is represented my improved sheetalining gage or wing scale, which may be pivoted, as by means of a pin 25, to a bracket 26, secured by screws or other appropriate fastening means 27 tothetype-bar segment. One such gage or wing scale may be mounted at each side of thetype-bar guide and ribbon vibrator. Each of these gages or wing scales may be yieldingly held in ill) / against said bracket.

close relation with a work-sheet, when placedabout the platen, as by a spring 28,'corled about the pin 25, mounted in the bracket 26, and having one end 29 bearing against the wing scale, and the other end 30 bearlng The position of the wing scale relatively to the platen is determinedby a stop 31 adapted to be brought into contact with the upper surface of'the type-bar segment. The upper edge 7320f each wing scale is so positioned relatively to the platen, and to the point at which vthe type-bars are brought to printing position,

as to immediately underlie the characters typed upon a work-sheet. The edge 32 of each gage orscale may also be'provided with letter-space indications 33 in the usual manner. 1

The alining gage or wing scale herein disclosed is a modification of one now in use on the Underwood typewriter and difiers therefrom in the following particulars:

Midway between theends of the gage or wing scale 24, there is provided a cut-away portion or recess 34: providing ample space through which access may :be had to an underlying work-sheet when it is desired to make an erasure of characters erroneously typed thereon. The outline of the wing scale is also modified, as indicated in Fig;

2, in which the dot-anddash lines indicate that of the gage or scale now in use on the Underwood typewriter. It may be observed that the gage has been enlarged or increased in dimensions at the lower right hand side,

as indicated at. 35, so that it will not be unduly weakened as a result of the cutting away oi part of the material-to form the recess 34, and that additional metal has also been added at the left end of the gage or scale, as indicated at 36, Fig. 2, so .as to provide a letter-space scale of ample length,

. the letter-positioning notch 37 being located as illustrated in Fig. 2.

at the extreme left end in the added portion,

a As already explained, the positions of the alining gages or wing scales are such that the last line of characters typed upon a work-sheet will always lie immediately above the edges 32 of said gages.

. thesheet, it is impossible to erase them without first making some change in the the positions 'ofithe ribbon spools and the Should one or more characters be erroneously typed upon other characters without in any manner disturbingthe adjustment between the platen and the work-sheet, thus avoldlng the necessity for making readjustments and the at tendant possibilitythat such readjustinents might not be accurately made,,in which case the typed sheet would be lacking in uniformity and neatness. It will also now be apparent that the herein-disclosed invention provides means for making erasures of letters erroneously typed atthe bottom of the work-sheet, which could not otherwise be corrected without removing the work from the machine. H V

Variations may be resorted to within the scope of the invention, and portions of the improvements maybe used without others. Having thus described my invention, I claim: 7 1

1. A wing-scale fora typewriting machine, having a long alining edge to lie along the platen at the printing line and at one side of the printing point, and an erasure opening in said wing-scale at saidalining edge to enable the erasure of erroneouslytyped characters in the printing linewhen said characters are brought opposite the erasure opening by longitudinal -;shifting of the platen. i

2. A work-sl1eet-alining gage for a typewriter, having a long ,alining e'dge'to maintain work-sheets against the platen at the printing line, and an erasure opening'in said edge to enable the erasure oferroneouslytyped characters at the printing line when at the erasure opening.

3. In a typewriting machine, a device comprising two worksheet-alining; gage" supported on the typewriter frameand having lon upper alining edges lying immediately below the printing line and extending from the printing point on opposite sides thereof, said gages also serving to hold wor sheet inproper relation to the platen along roneously-typed characters away from the printing line. a

. g I EDWIN A. PETERSON. 4 Witnesses: V

KING M. BACON, iALVIN ANDnasoN. 

